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What _______ can be drawn from the experiment of two American physicists, Clinton Davisson and Lester Germer?

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Certificates provide proof of your _______.

Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions.

The students got high marks in the test but Mary stood out.

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It seems that the thief took _______ of the open window and got inside that way.

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Rocks have forming, wearing away and re-forming ever since the Earth took shape.

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“Remember to phone me when you arrive at the airport, _______?”

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There has been a widespread _______ about whether North Korea has successfully miniaturized a nuclear weapon and whether it has a working H-bomb.

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The nesets of most bird species are strategic placed to camouflage them against predators